IB Design Technology - Topic 4: Material Properties and Timber

Creosote

________- A material that penetrates wood fibers and protects them from fungi and insects, however, this material is also a carcinogen.

Plasticity

________- How easily something can permanently change in shape.

Toughness

________- The ability to absorb energy without fracturing.

Particleboard

________- Made from gluing wood chips, usually veneered or plastic laminated to hide the ugly interior, heterogeneous, NOT WATER RESISTANT.

Hardness

________- A materials resistance to small permanent deformation (scratching)

Shape

________- Memory- A property that exhibits pseudo- elasticity, an applied load causes molecular rearrangement which is reversed when the load is taken off.

Timber

What is a category of materials that covers woods from trees? Answer with a single words or term.

Stiffness

________- How much a material bends.

Kiln

________- drying- Similar to air- drying but wood is dried in a(n) ________ instead of in the air, dries quicker but runs the risk of splitting.

Magneto Electro

________- Rheostatic- Property that allows liquids to change in viscosity when introduced to a magnetic or electric field.

Thermoelectricity

________- A property of a material that converts a temperature difference into electric current.

Timber Finishes

________- Similar to stain preserves but has the added benefit of improving the natural beauty.

physical property

A(n) ________ is a characteristic of a material identified through an experiment.

Softwood

________- A wood that comes from deciduous trees.

Compressive Strength

________- How well a material can withstand a crushing force.

Tensile Strength

________- How well a material can withstand a pulling force.

Thermal Expansion

________- How much a material increases in volume when heated.

Oils and Wax

________- Give a dull shine, improves color, and protects.

Mass

________- The amount of matter in a unit of material.

Electrical Resistance

________- How well a material resists the flow of electricity.

Thermal Conductivity

________- How well a material allows the flow of heat.

Smart Mat

________- A material that has properties that can change with external stimuli.